The Onyx Avanti 65 Balanced Flue Gas Fire is a luxury landscape fire that brings together breathtaking flame realism, premium design, and exceptional efficiency. Specifically engineered for homes without a chimney, this modern gas fire transforms living spaces with its widescreen flame picture and sleek, customisable styling options.
Bold Contemporary Design
Crafted with landscape proportions and a minimalist aesthetic, the Avanti 65 makes an immediate statement in any room. It can be installed as a hole-in-the-wall feature fire, raised above floor level for a striking focal point, or set at hearth level within a bespoke fireplace surround. A choice of finishes allows you to tailor the appearance to your interior: opt for the Edge+ frame for a seamless, modern look, the Expression frame for a bolder design statement, or a frameless installation for a true built-in feel.
Flexible Installation for Chimney-Free Homes
As a balanced flue model, the Avanti 65 is ideal for properties without an existing chimney. Two flue systems are available to suit different layouts. The Up & Out kit allows the flue to exit through an external wall, perfect if the stove is positioned against an outside wall. Alternatively, the Vertical kit enables the fire to vent upwards through the roof, making it an excellent option for single-storey homes and extensions. For homes with a masonry chimney, the optional Chimney Renovation Kit provides yet another installation pathway, using the chimney for air intake and exhaust.
Stunning Flame Realism
At the core of the Avanti 65 lies an advanced burner system designed to recreate the mesmerising beauty of a real wood fire. Hand-painted split oak logs sit on a glowing ember bed, with wraparound flames dancing naturally around the fuel pieces. The firebox is lined with EchoFlame™ Black Glass panels, which reflect the flames to create extra depth and movement, ensuring every viewing angle is captivating. The inclusion of non-reflective glass as standard ensures the flame picture remains crystal clear.
High Performance and Efficiency
This model is not only beautiful but also highly effective. With a maximum output of 4.7kW, the Avanti 65 provides ample warmth for medium to large rooms. Thanks to its impressive efficiency rating of 89.1%, the heat you feel is optimised while running costs remain low. By drawing air directly from outside and venting safely outdoors, the balanced flue system ensures clean, efficient, and reliable heating without the need for additional ventilation in most cases.
Smart Control at Your Fingertips
The Avanti 65 Balanced Flue is supplied with a fully sequential thermostatic remote control, allowing you to ignite the fire, adjust flame height, and set your desired room temperature at the touch of a button. Whether you want gentle ambience or full heat output, everything can be controlled effortlessly without leaving your seat.
Designed for Installers and Homeowners Alike
Unlike many large gas fires, the Avanti 65 has been carefully engineered for easy installation and servicing. A compact integrated control system reduces component complexity, while a reduced minimum vertical flue height of just 1.5m allows for greater flexibility in single-storey rooms. Ergonomic handles on the front glass make removal simple for maintenance, and the direct frame attachment system makes fitting faster and cleaner.
Built to Last
As part of the Stovax Heating Group, the Onyx range benefits from over four decades of innovation and craftsmanship. Every Avanti fire is manufactured from premium materials, with precision-engineered parts and a flawless finish. A 10-year extended warranty (upon registration) offers complete peace of mind, ensuring your investment in the Avanti 65 will deliver both style and performance for many years to come.
Key Highlights of the Onyx Avanti 65 Balanced Flue
Premium landscape balanced flue gas fire – ideal for homes without a chimney
Striking widescreen design with choice of Edge+, Expression, or frameless installation
Hand-painted split oak logs and glowing ember bed for incredible realism
EchoFlame™ Black Glass lining enhances flame depth and movement
Powerful 4.7kW heat output – perfect for medium to large rooms
High efficiency – up to 89.1%
Supplied with non-reflective glass as standard
Fully sequential thermostatic remote control for convenience
Compact control system for simplified servicing and fault-finding
Reduced minimum vertical flue height – just 1.5m required
Compatible with an optional chimney renovation kit
Natural Gas only model
No extra ventilation required in most cases
Backed by a 10 year extended warranty (subject to conditions)